Optical and electrical properties of ZnO and ZnO: TiO2 thin films prepared by sol-gel spray-spin coating technique

In this work, a ZnO and composite ZnO: TiO₂ thin films were conducted on glass prepared by sol-gel spray-spin coating technique. The performance and properties of nanostructured ZnO and ZnO: TiO₂ thin films at different thickness were investigated. The effect of thickness on the electrical properties and optical properties have been characterized by using 2-point probe KEITHLEY 2400 source meter and UV-Vis spectrophotometer respectively. From the current-voltage measurement it shows the conductivity of nanocomposite ZnO: TiO₂ thin films were higher compare to nanostructure ZnO thin films. The optical properties show the band gap for nanocomposite ZnO: TiO₂ decreases as the thickness increase.